Acoustic signal output device
The open-ear acoustic signal output device addresses sound leakage by employing antiphase signals and sound hole arrangements to cancel out leakage components, improving sound containment.
US20260143272A1Pending Publication Date: 2026-05-21NT T INC
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Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Applications(United States)
- Current Assignee / Owner
- NT T INC
- Filing Date
- 2021-11-09
- Publication Date
- 2026-05-21
AI Technical Summary
Technical Problem
Open-ear earphones and headphones experience significant sound leakage to the surroundings, which is a common issue among acoustic signal output devices that do not seal the ear canal.
Method used
An open-ear acoustic signal output device is designed with a first signal output unit emitting a first monophonic acoustic signal and a second signal output unit emitting an antiphase or approximate antiphase signal, with strategically arranged sound holes to cancel out sound leakage components.
Benefits of technology
This design effectively reduces sound leakage to the surroundings by canceling out sound leakage components using antiphase signals, enhancing acoustic signal attenuation.
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Smart Images
Figure US20260143272A1-D00000_ABST
Abstract
Provided is an open-ear acoustic signal output device worn on both ears, including a first signal output unit that outputs a first output signal for outputting a first monophonic acoustic signal from a first acoustic signal output unit worn on one ear, and a second signal output unit that outputs a second output signal for outputting a second monophonic acoustic signal from a second acoustic signal output unit worn on another ear. Here, in a case where the first monophonic acoustic signal is output from the first acoustic signal output unit and the second monophonic acoustic signal is output from the second acoustic signal output unit, an attenuation rate of the first monophonic acoustic signal at a second point with reference to a predetermined first point, where the first monophonic acoustic signal arrives at the first point and the second point is farther from the first acoustic signal output unit than the first point, is equal to or less than a predetermined value smaller than an attenuation rate due to air propagation of an acoustic signal at the second point with reference to the first point. Alternatively, an attenuation amount of the first monophonic acoustic signal at the second point with reference to the first point is equal to or more than a predetermined value larger than an attenuation amount due to air propagation of an acoustic signal at the second point with reference to the first point.
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